wireless repeater?

hi,

I would expand my home network with a routerboard (2 wlan inside).
I’ve already a DLink wifi device, that is my main ap.
Now I need to get the signal from my DLink and repeat it.
It’s possible?
I need to preserve DLink as “ap bridge” (I’ve already clients attached to it) and I would keep unchanged my wifi ssid.
Thank you very much.

Best way would be to set one Wlan as AP and link with other Wlan to Dlink.